Chore: Upgrade Vitest to v4 (#7797)

## Summary

https://vitest.dev/guide/migration.html#vitest-4

## Changes

- **What**: Update Vitest and some associated dependencies
- **What**: Fix issue with our existing mocks and mock types

## Review Focus

Double check the test updates. I tried to keep the changes minimal.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-7797-Chore-Upgrade-Vitest-to-v4-2d96d73d3650810cbe3ac42d7bd6585a)
by [Unito](https://www.unito.io)

---------

Co-authored-by: GitHub Action <action@github.com>

tests-ui/tests/renderer/extensions/minimap/composables/useMinimapGraph.test.ts

@@ -19,7 +19,7 @@ vi.mock('@/scripts/api', () => ({
 
 describe('useMinimapGraph', () => {
   let mockGraph: LGraph
-  let onGraphChangedMock: ReturnType<typeof vi.fn>
+  let onGraphChangedMock: () => void
 
   beforeEach(() => {
     vi.clearAllMocks()

tests-ui/tests/renderer/extensions/minimap/composables/useMinimapInteraction.test.ts

@@ -7,7 +7,7 @@ import type { MinimapCanvas } from '@/renderer/extensions/minimap/types'
 describe('useMinimapInteraction', () => {
   let mockContainer: HTMLDivElement
   let mockCanvas: MinimapCanvas
-  let centerViewOnMock: ReturnType<typeof vi.fn>
+  let centerViewOnMock: (worldX: number, worldY: number) => void
 
   beforeEach(() => {
     vi.clearAllMocks()
@@ -29,7 +29,7 @@ describe('useMinimapInteraction', () => {
       setDirty: vi.fn()
     } as any
 
-    centerViewOnMock = vi.fn()
+    centerViewOnMock = vi.fn<(worldX: number, worldY: number) => void>()
   })
 
   it('should initialize with default values', () => {